Coagulation of turbid water using natural material: cactus

Yeoh, Kar Chuan (2007) Coagulation of turbid water using natural material: cactus. Universiti Malaysia Sabah. (Unpublished)

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Abstract

The ability of cactus (Opuntia ficus indica) as natural coagulant for treatment of turbid water was tested according to jar test. Kaolin was used to produce the synthetic turbid water. The experiment variables were coagulant dosage, initial turbidity value and pH. For comparison, a similar study was carried out using a conventional coagulant, aluminium sulphate. Coagulation using cactus attained a maximum of turbidity removal efficiency of 74.9% for initial turbidity of 60.5 NTU compared to 73.1% by alum. The optimum dosage for cactus and alum was 0.03g and 0.2g respectively. As the cactus dosage increased, turbidity removal efficiency dropped until 58.2% compared to alum which remained constant at about 72.2°/ö. As the initial turbidity increased, turbidity removal efficiency for cactus decreased but increased for alum. The optimum initial turbidity for both cactus and alum was 41 NTU and 81.5 NTU, respectively. Effect of pH varies for both alum and cactus. The optimum pH for cactus was 2 at 0.015g and 0.03g dosage while for alum is 6 at 0.2g dosage. As the pH increased, turbidity removal efficiency for cactus decreased but remained uncertain for alum.

Item Type: Academic Exercise
Uncontrolled Keywords: Cactus, Opuntia ficus indica, Treatment of turbid water
Subjects: ?? QK474.8-495 ??
Divisions: SCHOOL > School of Science and Technology
Depositing User: Unnamed user with email storage.bpmlib@ums.edu.my
Date Deposited: 23 Mar 2011 03:25
Last Modified: 17 Oct 2017 05:46
URI: http://eprints.ums.edu.my/id/eprint/2233

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